void main() {
  var num = 3;
  if (num < 0) {
    print("< 0");
  } else if (num > 2) {
    print("else if");
  } else {
    print("else");
  }

  const array = ["1", "2", "3"];
  for (var o in array) {
    print(o);
  }

  var limit = 10;
  while (limit-- > 0) {
    if (limit % 2 == 0) {
      continue;
    } else if (limit % 3 == 0) {
      break;
    }
    print(limit);
  }

  int s = 2;
  switch (s) {
    case 1:
      print("s1");
      break;
    case 2:
      print("s2");
      break;
  }
}
